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  • Gerin, M.LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France (author)

Interstellar OH+, H2O+ and H3O+ along the sight-line to G10.6-0.4

  • Article/chapterEnglish2010

Publisher, publication year, extent ...

  • 2010-07-16
  • EDP Sciences,2010
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:842a3b9a-685e-49ae-bffb-669d04091db9
  • https://doi.org/10.1051/0004-6361/201014576DOI
  • https://research.chalmers.se/publication/126555URI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • We report the detection of absorption lines by the reactive ions OH+, H2O+ and H3O+ along the line of sight to the submillimeter continuum source G10.6$-$0.4 (W31C). We used the Herschel HIFI instrument in dual beam switch mode to observe the ground state rotational transitions of OH+ at 971 GHz, H2O+ at 1115 and 607 GHz, and H3O+ at 984 GHz. The resultant spectra show deep absorption over a broad velocity range that originates in the interstellar matter along the line of sight to G10.6$-$0.4 as well as in the molecular gas directly associated with that source. The OH+ spectrum reaches saturation over most velocities corresponding to the foreground gas, while the opacity of the H2O+ lines remains lower than 1 in the same velocity range, and the H3O+ line shows only weak absorption. For LSR velocities between 7 and 50 kms$^{-1}$ we estimate total column densities of $N$(OH+) $> 2.5 \times 10^{14}$ cm$^{-2}$, $N$(H2O+) $\sim 6 \times 10^{13}$ cm$^{-2}$ and $N$(H3O+) $\sim 4.0 \times 10^{13}$ cm$^{-2}$. These detections confirm the role of O$^+$ and OH$^+$ in initiating the oxygen chemistry in diffuse molecular gas and strengthen our understanding of the gas phase production of water. The high ratio of the OH+ by the H2O+ column density implies that these species predominantly trace low-density gas with a small fraction of hydrogen in molecular form.

Subject headings and genre

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  • de Luca, M.LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France (author)
  • Black, John H,1949Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)jblack (author)
  • Goicoechea, J.R.Centro de Astrobiologia (CAB) (author)
  • Herbst, E.Ohio State University (author)
  • Neufeld, D.A.Johns Hopkins University (author)
  • Falgarone, E.LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France (author)
  • Godard, B.LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France,Institut d'Astrophysique Spatiale (author)
  • Pearson, T. J. (author)
  • Lis, D.California Institute of Technology (Caltech) (author)
  • Phillips, T.G.California Institute of Technology (Caltech) (author)
  • Bell, T. A.California Institute of Technology (Caltech) (author)
  • Sonnentrucker, P.Johns Hopkins University (author)
  • Boulanger, F.Institut d'Astrophysique Spatiale (author)
  • Cernicharo, J.Centro de Astrobiologia (CAB) (author)
  • Coutens, A.Centre national de la recherche scientifique (CNRS),Université de Toulouse,University of Toulouse (author)
  • Dartois, E.Institut d'Astrophysique Spatiale (author)
  • Encrenaz, P.LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France (author)
  • Giesen, T.Universität zu Köln,University of Cologne (author)
  • Goldsmith, P.F. (author)
  • Gupta, H. (author)
  • Gry, C.Laboratoire d'Astrophysique de Marseille (author)
  • Hennebelle, P.LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France (author)
  • Hily-Blant, P. (author)
  • Joblin, C.Centre national de la recherche scientifique (CNRS),Université de Toulouse,University of Toulouse (author)
  • Kazmierczak, M.Uniwersytet Mikolaja Kopernika w Toruniu,Nicolaus Copernicus University (author)
  • Kolos, R.Polish Academy of Sciences (author)
  • Krelowski, J.Uniwersytet Mikolaja Kopernika w Toruniu,Nicolaus Copernicus University (author)
  • Martin-Pintado, J.Centro de Astrobiologia (CAB) (author)
  • Monje, Raquel,1979Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)em1raque (author)
  • Mookerjea, B.Tata Institute of Fundamental Research (author)
  • Perault, M.LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France (author)
  • Persson, Carina,1964Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)carina64 (author)
  • Plume, R.University of Calgary (author)
  • Rimmer, P. B.Ohio State University (author)
  • Salez, MLERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France (author)
  • Schmidt, M.European Space Astronomy Centre (ESAC) (author)
  • Stutzki, J.Universität zu Köln,University of Cologne (author)
  • Teyssier, D.MPI fur Extraterrestrische Physik (author)
  • Vastel, C.Centre national de la recherche scientifique (CNRS),Université de Toulouse,University of Toulouse (author)
  • Yu, S. (author)
  • Contursi, A.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Menten, K.Gemini Observatory North (author)
  • Geballe, ThomasPolish Academy of Sciences (author)
  • Schlemmer, S.Universität zu Köln,University of Cologne (author)
  • Shipman, R.Netherlands Institute for Space Research (SRON) (author)
  • Tielens, A.G.G.M. (author)
  • Philipp-May, S.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR),Gemini Observatory North (author)
  • Cros, A.Centre national de la recherche scientifique (CNRS),Université de Toulouse,University of Toulouse (author)
  • Zmuidzinas, J.California Institute of Technology (Caltech) (author)
  • Samoska, L.A. (author)
  • Klein, K.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Lorenzani, A.Osservatorio Astrofisico di Arcetri,Arcetri Astrophysical Observatory (author)
  • LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, FranceChalmers tekniska högskola (creator_code:org_t)

Related titles

  • In:Astronomy and Astrophysics: EDP Sciences518:4, s. 110-0004-63611432-0746

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